6. Kathryn Merteuil

Cruel Intentions

As Kathryn Merteuil, the spiteful, vindictive megalomaniac, Sarah Michelle Gellar showed just how sexy she can be. Kathryn uses her sex appeal, as well as her good social standing to manipulate all those around her to meet her own vicious ends; in this case, simple revenge on a boy who broke her heart. All her manipulation, backstabbing and blackmail leads to the moral corruption of another student, the death of her stepbrother and her own outing as a cokehead and she-devil.